无线多媒体传感器网络中一种自适应的休眠调度策略

A Node Sleep Scheduling Scheme for Wireless Multimedia Sensor Networks

节点休眠调度机制可以让满足冗余条件的节点轮流进入低功耗的休眠状态,以达到延长网络生存时间的目的。无线多媒体传感器网络中邻近节点间存在的重叠区域,因此提出了一种基于FoV重叠区域的冗余判别模型。利用该冗余模型对节点进行休眠调度。为避免"盲点"区域的产生,在节点进入休眠状态前加入一个预休眠状态,并考虑了状态切换代价对节点进行休眠调度。仿真实验结果表明,该方法能有效降低网络能耗,延长网络的生命周期。

The node sleep scheduling mechanism allows the nodes which satisfy the redundancy condition to the low power sleep state in turn, thereby extending the network lifetime. Based on the overlapped FoV regions between the neighboring nodes of the wireless multimedia sensor networks , a redundant judge model used for node sleep scheduling is proposed. To avoid the ＂blind＂ region, a pre-sleep state before the nodes stay the sleep state is designed and also proposed a node sleep scheduling scheme according to the spending of switching the states. Simulation results show that the scheme can reduce the energy consumption and prolong the network lifetime effectively.